Completely Automated Public Turing Test to Tell Computers and Humans Apart (CAPTCHA) based Robot Challenges for SIP
draft-tschofenig-sipping-captcha-01

Document Type Expired Internet-Draft (individual)
Authors Hannes Tschofenig  , Eva Leppanen  , Saverio Niccolini  , Mayutan Arumaithurai 
Last updated 2008-02-25
Stream (None)
Intended RFC status (None)
Formats
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at
https://www.ietf.org/archive/id/draft-tschofenig-sipping-captcha-01.txt

Abstract

A common approach to deal with unwanted communication attempts is to rely on some form of authorization policies, typically whitelists. In order to populate the entries in such an access control list it is helpful to have a way to challenge the entity willing to engage in a conversation (unless they are already pre-authorized). One reason why this is desired is to deal with robots that are aggressively distributing messages. This document describes how "Completely Automated Public Turing Test to Tell Computers and Humans Apart" (CAPTCHA) tests, which require human interaction, are applied to SIP.

Authors

Hannes Tschofenig (hannes.tschofenig@nsn.com)
Eva Leppanen (eva.leppanen@hukassa.com)
Saverio Niccolini (saverio.niccolini@nw.neclab.eu)
Mayutan Arumaithurai (mayutan.arumaithurai@gmail.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)